Drilling-machine



(No Model.) '2 Sheets-Sheet 1. A. D. QUINT. DRILLING MACHINE.

Patented Nov, 24, 1891.

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N0.-463,790.. Patented Nov. 24; 1891.

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Nr'rn STATES PATENT QFFICEO ALANSON D. QUINT, OF HARTFORD, CONNECTICUT.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 463,790, datedNovember 24, 1891.

Application filed July 2, 1891. Serial No. 398,217 (No model.)

To all whom it may concern:

Be it known that I, ALANSON D. QUINT, of Hartford, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Drilling-Ma chines, of which the following is a full,clear, and exact description, whereby any one skilled in the art canmake and use the same.

My invention relates to the class of machine-tools that are used fordrilling or cutting either metal or wood; but it is particularly adaptedfor use on drilling-machines.

The object of my invention is to provide a drilling-machine that shallsupport in operative relation to a common drivingspindlc a plural numberof drill-spindles that may be thrown into or out of engagement with themain driving-spindle at will, so that the machine will have all of theadvantages of a gang-drill, although but a single drill will be in useat any one time for the purpose of boring holes in the work.

To this end my invention consists in the details of the several partsmaking up the drilling-machine as a whole and'in the com- 1 bination ofsuch parts, as more particularly hereinafter described, and pointed outin the claims.

Referring to the drawings, Figure 1 is a detail view in front elevationof the upper part 7 of a drilling-machine embodying my invention. Fig.2is a detail view in side elevation of the machine-head with parts cutaway to side elevation of the top of the standard and of theturret-head. Fig. 4 is a detail View in front elevation of theturret-head plate. Fig. 5 is a detail view in section of the turret-headlock, showing the bell-crank lever and end of the trip-rod.

In the accompanying drawings, the letter A denotes a column or standardof an upright drill, this part being of any convenient construction sofar as shape and height of the column and details of construction of thework-holding table are concerned, the latter being omitted as notdirectly pertaining to my'invention.

On the upper end of the column A is supported a frame B, preferably castto' shape and having bearings that support a shaft 0, on which is bornea pulley d in convenient Fig. 3 is a detail View in.

position to be connected bya belt to the counter-shaft or anyothersuitable source of power, while the inner end of this shaft 0 isprovided with a bevel cog-wheel c, that is in mesh with bevel co -wheelsthat are supported on the main driving-shafts that extend within theturret-head.

On a hub 12' on the front of the frame a turret-head D is rotarilysupported, and this turret-head has projecting radially from itsperiphery any desired number of drill-stocks E, the axes of the severaldrills supported in the turret-head all preferably lying in a planepassed through the turret-head at right angles to the axes of the maindriving-spindles. The purpose of this construction is to enablesuccessive drills borne in the drill-stocks to be brought into position,so as to exactly replace either of the preceding tools that has beenused for boring or cutting. For instance, if a hole previously drilledis to be reamed out a reamer borne in either of the other drillstocksmay be brought into the precise axial position necessary to enable ahole to be reamed through.

On' suitable bearings b in the frame a holand on the front end of thishollow shaft there is supported within the turret-head a frictiondriving-wheel H, located near the back of the chamber in the head. Adriving shaft G is likewise supported in the bearings b and it extendsthrough the hollowshaft F and has secured nearits support in the frame abevel co -wheel g in mesh with cog-wheel c, and on its front end issecured a frictional driving-wheel H. The result of this arrangement ofthe spindle-driving shafts F G is to cause the friction driving-wheels HII to rotate in opposite directions, so that a coneshaped pulley borneon the end of either of the drill-spindles will be driven and rotatedwhenever it is pressed into contact with the bevel-surfaces of the twofrictional drivingwheels.

.The turret is mounted on the hub on the frame eccentric to the axis ofthe main driving-shaft, so that the cone-shaped heads on the respectivedriving-spindles may be by the rotation of the head thrown into and outof engagement with the (ilriving-surfaees of the friction-wheels II II.These, relative positions of the several spindles, when in position foruse and when out of such position, are illustrated in the sectional viewin Fig. 2 of the drawings. The turret-head is held on the hub by meansof pointed screws d, that take into a groove (1 formed in a ring set ina socket in the surface of the hub or in a groove formed directly insuch surface. The two main shafts F and G are held against end wise playby lock-nuts that fit threaded surfaces on the respective parts on oneside of the bearing and by the hub of the cog-wheel resting against theopposite side of the bearing,assh0wn in Figs. Band 3 of the drawings.The chamber in the turret-head is closed by the cover-plate I, having asocket in which a bearing-block t' is supported, this having a stem thatextends through the cover and provided 011 the outer end with a nut 'i,that serves to hold this block against lengthwise displacement, althoughallowing it free rotation. A weight j is suspended from this stem, andits oiiice is to hold the eccentric bearingblock in the right positionto support and guide the end of the driving-spindle that rests in asocket therein, and it also relieves the hollow shaft from any frictionor from any work in acting as a support and bearing for the shaft andallows the turret-head to be freely revolved around the bearin g-shaf tsand the disk. Each of the drill-stocks, that may be integral projectionsfrom the periphery of the head, as shown, or separate fixtures therein,contains a tubular sleeve is, that forms a bearing for eachdrill-spindle Z, this sleeve fitting a threaded socket in the stock,being provided with a flanged head and a locknut W, the latter beingused to determine the precise position of the drill-spindle within thehub. A pair of nuts 7& is provided on the spindle for the purpose ofdetermining the extent of playor lengthwise motion of the spindle withinthe sleeve-bearin g, a shoulder back of the cone-shaped head on thespindle coming into contact with the nearer end of the sleeve acting inconnection with the ends to control the extent of play. Eachdrill-spindle is in proper position for work when it is brought into thevertical position, projecting downward from the head, as shown in Fig. 1of the drawings,-and there is sufficient lengthwise play always providedto allow of but a slight frictional contact between the drivingsurfaceson the friction-wheel and the surfaces of the cone on the drill-spindle,in order that the drill may be used for light work and the degree ofdriving power brought upon the drill-spindle may be proportioned to thework required. If a greater degree of driving power is required, it isgained by simply raising the work and thus bringing a greater pressurelengthwise upon the drill, and the greater such pressure the closer willbe the contact between the bevel-surfaces of the friction driving-wheelsand the surface of the cone, making a very delicate automatic adjustmentbetween the work required and the power employed.

My invention has been herein illustrated and described in connectionwith an upright drill; but it is evident that my invention is applicableto other forms of cutting-tools besides drills without requiring anymaterial change in the parts.

In order to hold the turret-head in proper position while one of thetools is being used, a lock N is employed, and this comprises aspring-bolt M, arranged in a socket in the front part of the frame andwith one end projecting into a bolt-socket n in theturret-head. A springm is arranged in the bolt-socket in such a manner as to press the bolt.normally toward the bolt-socket, and the outer end of the bolt has agroove-head m with which a pin borne on the upper end of the bell-crank0 is engaged. Thisbell-erank lever is mounted on the frame and has aconnecting-rod 0' extending from the end of the bell-crank to a lever ortreadle, by means of which thebolt may be withdrawn, so as to enable theturrethead to be rotated until the desired tool has been brought intoposition for use,when the locking device automatically secures the headagainst further rotation.

The double lock-nuts used on the respective driving-shafts enable thelatter to be adj usted lengthwise, so that the respectivefriction-wheels on said shafts maybe exactly adjusted with reference tothe head of the respective drill-spindles when the latter are inoperative position.

I claim as my invention-- 1. In combination with a supporting-standard,the main driving-shafts having a common axis and supporting on theirouter ends frictional driving-wheels, the frictional drivingwheels withbeveled edge fast to the respective shafts, the turret-head mountedeccentric to the driving-shafts, and the drill-spindles supported by theturret-head and each having a cone-shaped head located in operativerelation to the driviiigwheels, all substan tially as described.

2. In combination with a supporting-standard, the main dri ving-shaftshaving a common axis and supporting on their outer ends the frictiondriving-wheels, the driving-wheels with beveled edges arranged inopposition, the rotary turret-head mounted eccentric to the drivinshafts, and the rotarily-arranged toolspindles supported in stocks inthe turrethead, the several spindles each having a tapered head arrangedin operative relation between the opposing edges of the drivingwheelsand also having a limited lengthwise movement in their supports, allsubstantially as described. l

3. In combination with a supporting-standard, a main driving-shafthaving a friction driving-wheel secured to it within the turrethead, arotaryturret-head mountedeccentric to the driving-spindle, and therotarily-arranged tool-spindle having a driving-wheel with its surfacearranged in operative relation to the main driving-wheel, allsubstantially as described.

4:. In combination with a supporting-standard, a frame mounted on saidstandard, a main driving-shaft mounted in bearings on the frame, havinga bevel gear-wheel and a driving-pulley, a driving-shaft mounted inbearings on the frame, a cog-wheel fast to the shaft and in mesh withthe bevel-cog on the main shaft, a friction driving-wheel secured to theother end of the tubular shaft, a driving-shaft arranged and supportedwithin the tubular shaft and having acog-wheel in mesh with the wheel onthe driving-shaft and also a friction driving-wheel secured near the0pposite end of the shaft, a rotary'tu'rret-head mounted on the frameand supporting a plural number of tool-spindles, the severaltoolspindles rotarily arranged on the turret-head and each having atapered head adapted to be moved into frictional contact with thefriction driving-wheels, and the turret-lockingdevice, all substantiallyas described.

5. In combination with a supporting-frame, a driving-shaft mounted onsaid frame and bearing a frictional driving-wheel, a rotary turret-headmounted eccentric to the axis of the said driving-shaft and supporting aplural number of drill-spindles, and the drill-spindles rotarilyarranged in their respective stocks and having a limited lengthwise playtherein and having on the inner end of each spindle a frictionaldriving-wheel in operative relation to the frictional driving-wheels,all substantially as described.

6. In combination witha supporting-standard, the spindle-driving shaftsmounted in bearings in the frame and having a common axis, the frictiondriving-wheel secured to the respective shafts and havingbeveled edges,arotary turret-head mounted on the frame cc,- centric to the axis of saidshafts, a bearingblock supported in a socket in the inner surface of theouter wall of the turret and havmon axis and supporting on their outerends the friction driving-wheels, with means for rotating said wheels inopposite directions, the rotary turret-head, and the tool-spindlessupported in the turret-head, each with a head located between theopposing surfaces of the driving-wheels, all substantially as described.

8. In combination with a supporting-standard, the main driving-shaftshaving a common axis and supporting on their outer ends the frictiondriving-wheels, with means, substantially as described, for turning saidwheels in opposite directions, the rotary turret-head mounted eccentricto the driving-shafts, and the drill-spindles supported in theturret-head and each having a head arranged in operative relation to thedriving-wheels, all substantially as described.

ALANSON D. QUINT.

Witnesses:

OHAs. L. BURDETT, ARTHUR B. JENKINS.

